For the family, the Petoskey stop is a family favorite. Mom Darlene even lets them miss their first two days of school to participate.

"We just love it, we wouldn't miss it for anything," she said.

After hundreds of races, it's still hard for Darlene to watch.

"I turn my back at the start gate and every time they make a jump," she said. "It makes me nervous."

Unlike her kids, Darlene has no intention to race, but admits it's fun to ride the Honda.

"We're like a soccer family, only we do bikes," John said.

Another motocross duo, the Baker brothers, live off sibling rivalry. Tyler, 8, and Jacob, 11, are track regulars.

Tyler, who broke his leg last season, loves racing.

"I wanted to ride right away, I even sat on my bike with my cast on," Tyler said.

His dad, Larry Baker, smiles. Larry does not race but he does everything else. He said he's the coach. The Baker boys chime in he's the "cook, repair guy and driver."

Brother Ryan's jersey is covered in signatures from fellow racers.

"It's cool" the 11-year-old said of the sport with the defiance of a preteen.

Like the Bakers, the Schippers are racing siblings.

Kid sisters always want to be like their older sisters. They get in your makeup, clothes, steal boyfriends and long to ride your motorbike - well, at least for the mud-slinging daredevils, Kandace Schipper, 11, and Nicole Schipper, 13.

The sisters with matching strawberry blonde hair and golden smiles picked up the sport a few years ago. Their back yard in Hamilton was recently transformed into a racing haven.

"It's cool, because we're girls and it shows girl power," Kandace said. "It's not just for the boys."

Amber Prins, a friend of the family, is equally as spunky and a newcomer to the sport.

"We may be best friends, but once the gate drops they're your competition," said Amber, 11, of Holland .

Amber has shared some bumps. She recently fell off her bike and broke off part of her helmet, but luckily she was fine and more than ready to ride again.

Although Nicole has won several of her races, she still gets nervous.

"Before I break out of the starting gate I'm nervous, and then I just focus and ride," Nicole said.

Like all older sisters do, it's only natural to pass on advice.

"She needs to burn the clutch around the corners," Nicole said to little sis, Kandace.